title: Prevalence of malocclusion in 6-year-old Icelandic children.
abstract: The prevalence of different malocclusion features was investigated in 396 6-year-old Icelandic children, using the epidemiologic registration method described by Björk et al. in 1964. Girls were ahead of boys with regard to dental stage (P < 0.01). One or more permanent teeth were congenitally missing in 5% of the children. Postnormal occlusion was found in 27% of the boys and in 31% of the girls, and prenormal occlusion was found in 6% and 5%, respectively. Straight terminal plane at the second deciduous molars was found in individuals with either normal or postnormal occlusion. Thus, it can be misleading to use the relation of the terminal planes as a measurement of the sagittal relation between the jaws. The prevalence of hypodontia was much lower than has been reported previously for Icelandic children.
authors.affiliation: Department of Orthodontics and Facial Orthopedics, Dental Faculty, University of Bergen, Norway.
authors.forename: B
authors.initials: B
authors.lastname: Johannsdottir
authors.forename: P J
authors.initials: PJ
authors.lastname: Wisth
authors.forename: T E
authors.initials: TE
authors.lastname: Magnusson
mesh_terms: D000366:Age Determination by Teeth; D000848:Anodontia / Q000453:epidemiology; D002133:Calcium Sulfate; D016009:Chi-Square Distribution; D002648:Child; D003766:Dental Occlusion; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D007055:Iceland / Q000453:epidemiology; D007574:Jaw Relation Record; D008297:Male; D008310:Malocclusion / Q000000981:diagnostic imaging / Q000453:epidemiology* / Q000473:pathology; D003765:Models, Dental; D008963:Molar / Q000473:pathology; D015995:Prevalence; D011862:Radiography, Panoramic; D015203:Reproducibility of Results; D012737:Sex Factors; D014071:Tooth Abnormalities / Q000453:epidemiology; D014078:Tooth Eruption; D014094:Tooth, Deciduous / Q000002:abnormalities / Q000473:pathology
chemical_list: D002133:Calcium Sulfate